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Updated: Jul 15, 2026

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity
Published on: May 7, 2017
Direct intracranial recording of body-selective responses in human extrastriate visual cortex
Gilles Pourtois1, Marius V Peelen, Laurent Spinelli
1Swiss Center for Affective Sciences, University of Geneva, Geneva, Switzerland. gilles.pourtois@medecine.unige.ch
Abstract:
We recorded intracranial local field potentials (iLFPs) in right extrastriate visual cortex of a patient prior to surgery for epilepsy. Visual evoked potentials revealed a highly selective response to images of bodies, relative to faces, mammals, and tools, which was restricted to a focal region in the lateral occipitotemporal cortex that corresponds to the location of the extrastriate body area (EBA). Body-selective activity started around 190 ms and peaked 260 ms post-stimulus onset. These findings provide the first direct electrophysiological evidence for an early visual processing stage in human lateral occipitotemporal cortex that is specialized for processing human body shapes.

